<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"/>
    <title></title>
    <style>
        body {
            background-color: red;
        }
        @media screen and (max-width: 768px) {
            body {
                background-color: yellow;
            }
        }
        @media screen and (min-width: 768px) and (max-width: 992px) {
            body {
                background-color: green;
            }
        }
        @media screen and (min-width: 992px) and (max-width: 1200px) {
            body {
                background-color: skyblue;
            }
        }
        @media screen and (min-width: 1200px){
            body {
                background-color: pink;
            }
        }
    </style>
</head>
<body>
</body>
</html>